TY JOUR TI Investigating Drying Modes of the Traction Motor Moistened Insulation on Locomotives from the Perspective of Energy Efficiency KW Insulation drying KW electric calorifire method KW insulation drying modes KW variable power supply KW degree of moisture KW traction motor reliability JO Bulletin of scientific research results AU Hazheeva, M.Y. AU Dulskiy, E.Y. AU Ivanov, V.N. AU Kruchek, V.A. PY 2025 IS 2025 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"